Well I was actually back in October 2023 me and a fellow work colleague where standing in the depot in Duncrue and saw an aircraft approach from the SW direction. He through up a flight tracker on his phone and it was TUI 737 from Gran Canaria to Glasgow. The thing was the sky was clear hence why we saw if, but the strange thing was it started to trail contrails all of a sudden and then it stopped and came back on again. It was as if it was a string of more code but it adds fuel to speculation from many conspiracy theorists about chemtrails. We defo both saw it and are struggling to explain what it was. Any suggestions guys?
Easily explained, it`s either a change in alitude or an atmospheric anomaly.
It`s mearly water vapour,cause by hot engines in very cold air at altitude. Often below -55C, the regions of air that cause the trails are known to be wide but shallow. A difference in flight level of 1,000 feet is enough for one aircraft to cause a contrail and the other not.
It`s been happening since WWII.